Re: [PATCH v2] mm/Kconfig: make MEMORY_FAILURE select MIGRATION

[Miaohe Lin]

On 2026/8/13 21:49, Xie Yuanbin wrote:
> For embedded devices, lacking support for NUMA, memory hotplug/hotremove,
> CMA and huge pages is a quite common scenario. In this scenario, the
> demand for contiguous physical memory allocation is very low. To reduce
> the kernel image size, some devices disable the compaction. However,
> their SoCs do support DDR ECC, meaning that memory-failure may be needed.
> 
> Migration is very useful for soft_offline_page() in memory-failure, which
> may be triggered by correctable memory errors. Most anonymous and
> file-mapped faulty pages can be migrated to other healthy pages.
> 
> Currently, MEMORY_FAILURE does not explicitly select MIGRATION. When
> COMPACTION, MEMORY_HOTREMOVE, NUMA_MIGRATION and CMA are all disabled,
> MEMORY_FAILURE can be enabled, but MIGRATION cannot be selected.
> 
> Make MEMORY_FAILURE select MIGRATION to handle this situation.
> 
> Suggested-by: Mike Rapoport <rppt@xxxxxxxxxx>
> Cc: Lorenzo Stoakes (ARM) <ljs@xxxxxxxxxx>
> Cc: David Hildenbrand (Arm) <david@xxxxxxxxxx>
> Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
> Signed-off-by: Xie Yuanbin <xieyuanbin1@xxxxxxxxxx>

Acked-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>

Thanks.
.